\begin{tikzpicture}
    \tkzDefPoints{0/0/O, 4/0/A}
    \tkzDefPoint(55:4){B}
    \tkzDefPoints{3/1/C, 5/2/D}

    \tkzDrawSegments(O,A  O,B)
    \tkzDrawPoints(C,D)
    \tkzLabelPoints[below](O,A)
    \tkzLabelPoints[above](B)
    \tkzLabelPoints[below right](C,D)

    % \tkzDefLine[mediator](C,D)  \tkzGetPoints{c}{d}
    % \tkzDefLine[bisector](A,O,B)  \tkzGetPoint{e}
    % \tkzInterLL(c,d)(O,e)  \tkzGetPoint{P}
    % \tkzDrawPoints(P)
    % \tkzLabelPoints[below](P)
\end{tikzpicture}

